All jerin dunƙule gyare -gyare

Matsayin wasan ƙwanƙwasa ya ƙunshi ɓangarori biyu na lambobi, waɗanda bi da bi suna wakiltar ƙarfin ƙarfafawa na ƙwanƙwasa da ƙimar yawan kayan. Misali, ma'anar kusoshi tare da matakin aiki na 4.6 shine: lambar a kashi na farko (4 cikin 4.6) shine 1/100 na ƙarfin ƙarfin ƙarfi (n / mm2) na kayan ƙulle, wato Fu ≥ 400N / mm2; Lambar a kashi na biyu (6 cikin 4.6) shine sau 10 na yawan amfanin ƙasa na abin ƙulle, wato FY / Fu = 0.6; Samfurin lambobi biyu (4) × 6 = "24") shine 1 /10 na madaidaicin yawan amfanin ƙasa (ko ƙarfin samarwa) (n / mm2) na kayan rufewa, wato FY ≥ 240n / mm2.

Dangane da daidaiton masana'anta, za a iya raba kusoshi na tsarin ƙarfe zuwa matakai uku: A, B da CA Grade B mai ƙyalli ne mai ladabi, wanda galibi ana amfani da shi don samfuran injiniyoyi, kuma matakin C yana da ƙarfi. Sai dai in an baiyana takamaiman, kusoshin ƙarfe na tsarin ƙarfe galibi naƙasassun madaidaitan darasi ne na C tare da darajar aikin 4.6 ko 4.8.